If you're looking to take some of the edge off high gas prices, your local Walmart (WMT) may be able to help.
The retailer announced Monday that drivers in 21 states will be able to get 15 cents per gallon off their gas purchase when they pay with a Walmart credit card or MoneyCard; those using a Walmart gift card will get 10 cents off. The discount is effective immediately at more than a thousand Murphy USA and Walmart gas stations.
The program is a revival of last fall's "Great Gas Rollback" program, which offered an identical discount in 20 states. This iteration of the promotion will run through July 7.
Walmart isn't the only company offering a gas discount that depends on your payment method. As we've previously noted, mini-market chain Cumberland Farms offers a 10-cents-per-gallon discount when you pay using a smartphone app with a linked checking account. Walmart competitor Costco (COST), meanwhile, has an American Express (AXP) card that gives you 3% cash-back on all gas purchases. A few other credit cards likewise offer big cash-back bonuses for gas purchases, though those rates may vary by quarter.
As of this writing, the national average cost of a gallon of gas is $3.63. For the full list of states where you can get the discount, see Walmart's announcement.
Matt Brownell is the consumer and retail reporter for DailyFinance. You can reach him at Matt.Brownell@teamaol.com, and follow him on Twitter at @Brownellorama.